Frenchwoman Michele de la Becque, an opponent of the Nazis in German-occupied Paris, hides a downed American flyer, Pat Talbot, and attempts to get him safely out of the country.

Discharged for drinking, Coleman attempts to get even by releasing the brakes on an empty boxcar, to which is coupled a flatcar, allowing them to run wild down the main line on which he knows the president's special is coming. Coleman does not know that his children, Helen and Paul, are playing on the flat car.